package gacl.servlet.study;

import java.io.IOException;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class ServletContextDemo4
 */
@WebServlet("/ServletContextDemo4")
public class ServletContextDemo4 extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public ServletContextDemo4() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		
		//-z:此处注意： 我们通过response写入数据，数据类型必须一致。不能一段是字符串一段是字节流。必须全段一致。（也即在代码中不能将getwriter(字符串）的写入方式与 getoutputStream.write(字节流)的写入方式混合使用。
		
//		response.getWriter().append("Served at: ").append(request.getContextPath());
//		response.getWriter().print("ServletContextDemo4");
		
		String data = "<h1><font color = 'red'>adcefghijkl</font></h1>";
		response.getOutputStream().write(data.getBytes());
		
		
		ServletContext context = this.getServletContext();
		RequestDispatcher rd = context.getRequestDispatcher("/ServletContextDemo5");//获取请求转发对象(RequestDispatcher)
		rd.forward(request, response);//调用forward方法实现请求转发
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}
